Grinding-mill



3 Sheets-Sheet 1.

(No Model.)

A. S. WEAVER.

GRINYDING" MILL.

Patented Apr. 25, 1882.

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A. S. WIEIAVER.

GRINDING MIL-L. No. 256,935. Patented Apr. 25, 1882.

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A. S. WEAVER.

GRINDING MILL.

No. 256,935. Patented Apr.25,1882.

Wit/270305: 4 0% JKM' NTTnn STATES PATENT Tirion.

A N-DRUS S. VEAVER, OF JOY, NEV YORK, ASSIGNOI-t TO CHARLES H. MORSE, OF CHICAGO, ILLINOIS.

GRINDINGMILL.

.SPECIFICATION forming part of Letters' Patent No. 256,935, dated April 25, 1882.

Application tiled April 2, 1880. (No model.)

To all whom it may concer-n:

Be it known that I, ANDRUs S. WEAVER, residing at Joy, in the count-yV of Wayne and State of New York, and a citizen ofthe United States, have invented a new and uset'ul Improvement in Grinding-Mills, ot' which -the following. is a full description, reference being had to the accompanying drawings, in which- Figure l is a front elevation; Fig. 2, a side elevation. Figs. 3 and 4 show the inside of the two halves ofthe mill. Fig. 5 is a top view; Fig. 6, a longitudinal vertical section.

This invention relates to grinding-mills especially adapted for grinding grain; and it consists in the combination and organization of parts, as hereinafter fully described and illustrated.

In the drawings, AA' represent the two parts of the case, which may be of cast metal. They are substantial duplicates ot' each other, except that the edge of one overlaps the other alittle to make a closer joint.

B B are stationary grinding-rings secured upon the inside of A A', adapted to receive these rings,which said grinding-rings are beveled, as shown. These rings are respectively provided with the hub-like extensions a a', the inner faces of the hubs of said grindingrings being provided with coarse grooves B2.

C is a movable grinding-ring secured upon a shaft, H, which is in bearings b b formed with the case. Both faces of this ring C are pro- A vided with a grinding-surface correslionding with the grinding-surfaces of the two rings, B B'. This ring C also has hub-like extensions c c', provided with coarse grooves o2. This cen tral grinding-ring may be made in two parts, secured together or to a'suitable centerpiece, or may be made whole. d is a groove in the extreme outer edge of C. When C is made whole this groove may be omitted.

f is au annular ring, which encircles the grinder C and forms a division or partition between the two chambers. As herein shown, thegrinder C is composed oi' two parts, secured to a core, J, that is lixed upon the rotary shaft H. Each part or half of this grinder has an annular recess so formed that when the two halves are brought together, as in Fig. 6, the circumferential channel d (shown in said iigure) will be formed. The ring f, which is secured to or formed with the partition j, is made with an inner tiange, d2, which is received in the channel d of the rotary grinder, thus dividing the chamber within which the grinders are located, and also dividing the outlet-pas sage, E, for the purpose presently set forth.

The upper part ot' the case forms a hopper, D, from which the grain or otherarticle to be ground passes to the outside of the two fixed grinders B B andthrough openings g g in the hub-like extensions ce u', being delivered between the extensions on the inner and outer grindingrings. A portion of the hopper on the inside is covered by the wings 7L, bearing spaces 'i for the passage of the grain. To prevent clogging, the grain-passages gradually enlarge below the points i, asshown in Fig. 6.

E is the outlet-passage, which, as shown, is divided by the partition j, which is cast upon the ringf.

The two parts of the case are held together by means of a bolt, 7c, passing through ears k2 that are formed upon the two portionsAA of the case, and a right-and-lel't.-l1and' screw,

C, I have placed two projections or pins, r,

which serve the purpose of Scrapers to prevent the meal from becoming clogged in the said chambers. These serapers are secured in the peripheryof the rotary grinder C, and, as illustrated by Fig. 3, the pins move along the sides of the tlange d2 of ringf, their outer ends being within the said ring, so as not to touch the inner side thereof.

The operation is as follows: The article to be ground is admitted into the hopper D, from which it passes through the openings f/ in the hub-like extensions upon the fixed grinders B B and falls upon extensions c'o upon the inner double grinder, C, and will then be carried between the inner and outer hub-like extensions, a a c c', and will be cracked and broken. Passing then between the main port-ions of the grinders, it will be ground and will be delivered into such spaces or chambers within the lower portion of the two-part casing as are not occupied by the grinders, and from such spaces or chambers the meal willpass into the divided passage E.

The two sides of the mill are separated from each other, and two different articles could be ground at the same time, if desired, being kept separate in the hopper and the deliverytubes being suitably arranged.

' Two or more of these mills can be arranged side .by side and be driven by a single shaft. Apysuitable power may be used.

The ringf, which separates the two chainbcrs fr orn each other, and the partition j in the discharge-passage E, may be omitted from all vmills which are not designed to grind and separately deliver two different articles at the Same time.-

The wings or projections 71. h in the hopper can .be conveniently cast with the two partsof the case, one on each part. These parts h h are desirable. They support the body of the grain .in the hopper; but a sufficient quantity can pass through the passages fi, below which the openings enlarge, and thereby clogging is prevented without the use of agitators.

The shaft H may be extended to receive a driving-pulley, and the outer end of such shaft beyond the pulley may be supported by an arm suitably secured to the base F and provided with a bearing.

WhatI claim as new, and desire to secure by Letters Patent, is as follows:

l. The cornbination,in a grinding-mill, ofthe two parts A A, composing the casing,witl1 the outer stationary grinding-rings B B', respectively connected with said two parts of the casing, and formed with hubs having grindingfaces and the inner rotary grinder, C, composed of two parts, each formed with a hub having a grinding-surface, substantially as described.

2. The combin ation, in agrinding-mill, of the rotary shaft with the grinder C, having a circumferential groove. d, and provided with scrapers i, the ringf, having a flange, d?, received into said groove, thepartition j, dividing the delivering-passage, and the grinding-rings B B', said members being constructed and organized substantially as and for the purpose described.

3. The combination,in agrinding-mll, ofthe two-part easing A A', having the wings h., arranged within the hopper substantially as set forth, with the stationary grinding-rings B B', having hubs aa and openings g, and the rotary grinder G, all constructed and arranged substantially as and for the purpose specified.

ANDRUS S. WEAVER.

Vitnesses:

E. A. WEST, O. W. BOND. 

